Cylinder head



y 9 c. w. CRAM 1,715,225

CYLINDER HEAD Filed Nov. 1927 iarlaaWrwm;

INVENTOR ATTO R N EY Patented 1 fonennns w. enema, or BInMmenAr/r, ALABAMA, essronon or ONE-THIRD T ED- wean a. comma, or MCHENBY, MISSISSIPPI.

CYLINDER HEAD.

. Application filed November 29, 1927. Serial No. 236,497.

My present invention has reference to internal combustion engines and my obyect 1s to provide the cylinder head of this type of engines with a. supplemental or auxlllary compression chamber that communicates with the compression chamber in the head, and wherein the passage between the auxiliary and main or ordinar compression chamber is controlled by a va ve operable to establish communications between these chambers or to close such communication and whereby when the-auxiliary chamber 1s closed by the valve the pistons will operate to turn the engine at normal or ordinary speeds wlth a comparatively small consumption of fuel,

but when the valve is open a greater compression space is provided and while more fuel is required the pistons will operate the engine to cause the sameto travel at a greater speed and with more power, the valve being opened when the automobile operated by the engine is traveling inclines at high speedand upon other occasions when high speed is deslred.

To the attainment of the foregoing the 1nvention consists in the improvement as hereinafter described and definitely clalmed.

In the drawings: a

Figure 1 is a sectional view through the upper portion of an engine block, embodylng my improvement.

Figure 2 is a side elevation thereof to bet ter illustrate the manner in which the valve is held seated or is spring influenced to unseated position.

In the drawings I have deemed it necessary to show only one of the piston cylinders of an engine block 1, and one of the compression chambers 2 on the head 3 for the block. The head is provided with the usual spark plug opening 4 and to one side of sa d opening the head is integrally formed with what I will term an auxiliary compresslon chamber 5. A port 6 establishes a communication between the auxiliary compression cham- 45 her 5 and the main compression-chamber 2 in the head 3. By reference to Figure 1 of the drawings it will be noted that the compression chamber is cast with'a head in a manner to permit of a circulation of water entirely around the auxiliary compress on chamber and likewise that the compression chamber is extended a considerable distance above the top of the head proper and is interiorly threaded. The open outer end of the compression chamber has screwed therein a flanged member or cap hat 7 which is centrally and integrally formed with a depending sleeve portion 8. The lower wall of the compression chamber is flared toward the port or opening 6 and the portion of the lower Wall around the said opening is beveled to provide a seat for a valve 9. The stem 10 for the valveextends through an opening in the sleeve 8 and through the cap nut 7. The sleeve has fixed thereon, adjacent to its outer end a washer 11 which is contacted by a helical spring 12 that surrounds the stem 10. The spring also contacts with a washer 13 arranged on the top of the flanged cap nut 7. The outer end of the rod 10 is rounded and is received in a longitudinal groove 'provided in a slide block 14. The inner wall 15 of the groove is beveled. The block 14 is fix- The spring 12 will normally unseat the valve 9 but the wedge block 14, when the rod 16 is moved to one position, will hold the valve seated. \Vhen the valve is seated, the piston in the engine cylinder will compress the fuel in the compression chamber 2 of the head 3, and the engine may be speeded up to say 45 miles per hour. lVhen the valve is closed a smaller amount of fuel is used. When the rod is moved to permit of the opening of the valve 6, the fuel is compressed in both the compression chambers 2 and 5 which, of,

course, will require a larger volume. of fuel, but the explosion thereof will impart a greater power and speed to the piston so that the engine will revolve at a high speed which is desirable for hill climbing and for other pur poses.

lVhile I have illustrated a satisfactory embodiment of my improved device my features of invention are capable of extended application and I do not wish to be restricted to the specific structure herein shown and described.

Having described the invention, I claim:

1. An internal combustion engine having a head provided with an auxiliary compression chamber and having a port which establishes a communication betweenv the auxiliary C0111- pression chamber and the chamber in the head, a cap nut closing the outer and open end of the auxiliary compression chamber, a valve for closing the port between the compression chambers, a stem for the valve passing through the cap nut, spring means influencing the spring to unseat the valve, a block having a Wedge groove therein which is movable over the outer end of the valve stem, and an operating rod for said block.

2. A head for the cylinder block of an internal combustion engine, having a compres- .sion chamber, and-having an-outwardly extending auxiliary compression chamber, and provided with a port which establishes a communication betweenboth compression chamhere, a cap nut screwed in and closing the auxiliary compression chamber and having a sleeve extension, a valve for closing the port between the compression chambers, a stem for the valve directed through the sleeveiand' through the cap nut, a stop element on the stem outward of the cap nut, a coil spring surrounding the stem and exerting a pressure against the stop element and the cap nut, said stem having anvouter rounded end, a block having a longitudinal groove whose inner Wall is beveled, and in which groove the said outer end of the stem'is received, and a slidable rack fixedly secured to the block, for the purpose set forth.

In testimony whereof I aflix my signature.

CHARLES W. CRAM. 

